Molly Killingbeck (born March 2, 1959, in Jamaica) is a Canadian athlete who competed in two consecutive Summer Olympics for Canada, starting in 1984.

At the 1984 Summer Olympics held in Los Angeles, U.S. she won the silver medal in the 4 x 400 metres with her team mates Charmaine Crooks, Jillian Richardson and Marita Payne.

Killingbeck admitted to using performance enhancing drugs at the Dubin Inquiry in 1989 and subsequently had her funding suspended.

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